Patents by Inventor Debashish Purkayastha

Debashish Purkayastha has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20060212705
    Abstract: A method and apparatus for securing transmission of content created by a content generation device embedded in a wireless transmit/receive unit (WTRU) by determining what type of watermarks should be applied to the content and incorporating the watermarks in the content. The WTRU includes a content generation unit, a watermark incorporation unit, and a communication subsystem. The content generation unit is embedded in the WTRU and generates content, such as audio, video, image, text or a combination thereof. The watermark incorporation unit determines the type of watermarks that should be incorporated in the content and incorporates the watermarks in the content. The communication subsystem transmits the watermarked content.
    Type: Application
    Filed: March 17, 2005
    Publication date: September 21, 2006
    Applicant: InterDigital Technology Corporation
    Inventors: John Thommana, Debashish Purkayastha, Alain Briancon
  • Publication number: 20060172762
    Abstract: A method for tracking content objects created on a wireless device in a wireless communication system begins by creating a content object at the wireless device. A content creation request message is sent from the wireless device to an information storage entity (ISE). The ISE determines whether any permissions are required to create the content object. A content creation response message is sent from the ISE to the wireless device, the content creation response message including an identification key specific to the content object. The identification key is embedded into the content object by the wireless device.
    Type: Application
    Filed: October 31, 2005
    Publication date: August 3, 2006
    Applicant: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, John Thommana, Alain Briancon
  • Publication number: 20060159302
    Abstract: A method and apparatus for generating and adjusting a watermark in a watermarking system comprising a watermark generator and a watermark detector includes the watermark generator emitting the watermark. The watermark detector detects the watermark. The watermark detector transmits a signal to the watermark generator. The watermark generator then adjusts the generated watermark based on the signal received from the watermark detector.
    Type: Application
    Filed: November 23, 2005
    Publication date: July 20, 2006
    Applicant: InterDigital Technology Corporation
    Inventors: Steven Goldberg, Debashish Purkayastha
  • Publication number: 20060159440
    Abstract: An automatic anti-focusing mechanism which generates and emits one or more distortion signals includes one or more sound or light generators which generate the distortion signals in various portions of their respective spectrums. The emitted distortion signals are received by an active automatic focusing camera and inhibit the ability of the active automatic focusing camera to properly detect a signal reflected off of a subject. Accordingly, the ability of the active automatic focusing camera to properly focus upon a subject is severely limited or disabled.
    Type: Application
    Filed: November 23, 2005
    Publication date: July 20, 2006
    Applicant: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Alain Briancon, John Thommana
  • Publication number: 20060148418
    Abstract: A method and apparatus for protecting sensed content and warning a target of sensing is disclosed. A first transceiver, (e.g., a network server), includes a database which defines at least one zone in which sensing a target is not permitted. A second transceiver, (e.g., a cell phone), senses a target to obtain content and temporarily stores the content in a memory, after being encrypted. The cell phone transmits information to the network server which indicates the location of the cell phone. The network server receives the location information from the cell phone and determines whether the target was sensed in a “Do Not Disturb Zone”. If so, the network server instructs the cell phone to delete the encrypted content from the memory. Otherwise, the network server indicates to the cell phone that the temporarily stored content may be decrypted, stored in a permanent memory and used as desired.
    Type: Application
    Filed: November 30, 2005
    Publication date: July 6, 2006
    Applicant: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, John Thommana
  • Publication number: 20060140405
    Abstract: A method for protecting a content object with rights management information begins by creating a content object. Permissions are assigned to the content object, an encryption key is generated, and a content protection utility is cloned. The cloned content protection utility, the encryption key, and the permissions are appended to the content object to create a composite object. The composite object is encrypted with the encryption key to create a protected content object.
    Type: Application
    Filed: November 23, 2005
    Publication date: June 29, 2006
    Applicant: InterDigital Technology Corporation
    Inventors: John Thommana, Debashish Purkayastha
  • Publication number: 20060122967
    Abstract: A method for distributing information to a user of an information system via a device begins by selecting a user profile. Information is received at the device and is filtered with the selected user profile. The filtered information is displayed to the user.
    Type: Application
    Filed: November 18, 2005
    Publication date: June 8, 2006
    Applicant: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, John Thommana
  • Patent number: 6987985
    Abstract: A mobile wireless transmit/receive unit (WTRU), components and methods therefor provide continuous communications capability while switching from a wireless connection with a first type of wireless system to a wireless connection with a second type of wireless system. Preferably, the WTRU is configured to switch wireless links from a Universal Mobile Telecommunications System (UMTS) to a wireless local area network (WLAN) or vice versa during a continuous communication session. The invention is preferably implemented by providing an Application Broker for control signaling and a Communications broker for user data flow which may be embodied in an application specific integrated circuit (ASIC).
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: January 17, 2006
    Assignee: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Amarnath Chitti
  • Publication number: 20050232580
    Abstract: A method and apparatus are disclosed for selectively regulating devices. In a wireless communication system, a regulation zone is defined. Devices within a regulation zone (e.g. an electronic do-not-disturb (EDND) zone) are regulated by generating and transmitting inhibiting signals into or near the regulation zone. The inhibiting signals may be messages instructing devices to disable one or more of their sensing components or actual interference signals that prevent sensing components from functioning properly or watermarks that mark illicit recordings so that such illicit recordings are precluded from being transmitted over the network.
    Type: Application
    Filed: March 11, 2005
    Publication date: October 20, 2005
    Applicant: InterDigital Technology Corporation
    Inventors: Steven Goldberg, Richard Herschaft, Alain Briancon, Debashish Purkayastha, John Thommana
  • Publication number: 20050226421
    Abstract: A method and system for using watermarks in communication systems is disclosed. Watermarks are typically small amounts of auxiliary data embedded in a cover signal. The cover signal is the primary communication signal, and may be binary bits, multi valued symbols, analog waveforms, or any other type of primary communication signal. Security strength indication, location tracking, intrusion detection and transmission of non-security information using watermarks are disclosed, along with a system for managing watermarks.
    Type: Application
    Filed: February 18, 2005
    Publication date: October 13, 2005
    Applicant: InterDigital Technology Corporation
    Inventors: Alain Briancon, Akinlolu Kumoluyi, Alan Carlton, Richard Herschaft, John Hoffmann, Prabhakar Chitrapu, Debashish Purkayastha
  • Patent number: 6940844
    Abstract: Method and apparatus for enabling a wireless terminal to communicate the dual-mode capabilities and reporting the interworking capabilities of the two networks with which the wireless terminal have the added capability of obtaining services from either one of the interworking networks.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: September 6, 2005
    Assignee: Interdigital Technology Corporation
    Inventors: Debashish Purkayastha, Kamel M. Shaheen
  • Publication number: 20050163089
    Abstract: Method and apparatus for enabling a wireless terminal to communicate the dual-mode capabilities and reporting the interworking capabilities of the two networks with which the wireless terminal have the added capability of obtaining services from either one of the interworking networks.
    Type: Application
    Filed: March 17, 2005
    Publication date: July 28, 2005
    Applicant: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Kamel Shaheen
  • Publication number: 20050154925
    Abstract: Tokens/keys are produced for wireless communications. These tokens/keys are used for watermarks, signature insertion, encryption and other uses. In one embodiment, contextual information is used to generate tokens/keys. The tokens/keys may be derived directly from the contextual information. The contextual information may be used in conjunction with other information to derive the tokens/keys. Tokens/keys may be exchanged between transmit/receive units. The exchange of these tokens/keys may be encrypted.
    Type: Application
    Filed: November 23, 2004
    Publication date: July 14, 2005
    Applicant: InterDigital Technology Corporation
    Inventors: Prabhakar Chitrapu, Alain Briancon, Akinlolu Kumoluyi, Alan Carlton, Kiran Vanganuru, Richard Herschaft, John Hoffmann, John Thommana, Debashish Purkayastha, Guodong Zhang, Robert Olesen, Alexander Reznik, TieJun Shan, Sung-Hyuk Shin, Amit Singhal
  • Publication number: 20050141447
    Abstract: An Application Server Autonomous Access (ASAA) system for providing autonomous access to a wireless infrastructure by devices employing different types of access technology. The system includes a server, having an associated data storage device, for storing at least one policy, and a plurality of subnetworks, coupled to server, for providing access to the server. The plurality of subnetworks employ at least two different types of access technology. A plurality of wireless transmit/receive units (WTRUs) are wirelessly coupled to at least one of the subnetworks. The server monitors the wireless coupling and, depending upon the at least one policy, switches the WTRUs between different ones of the subnetworks.
    Type: Application
    Filed: November 12, 2004
    Publication date: June 30, 2005
    Applicant: InterDigital Technology Corporation
    Inventors: Alan Carlton, Narayan Menon, Debashish Purkayastha
  • Publication number: 20050083893
    Abstract: Method and apparatus for enabling a wireless terminal to communicate the dual-mode capabilities and reporting the interworking capabilities of the two networks with which the wireless terminal have the added capability of obtaining services from either one of the interworking networks.
    Type: Application
    Filed: December 31, 2003
    Publication date: April 21, 2005
    Applicant: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Kamel Shaheen
  • Publication number: 20050002407
    Abstract: Method and apparatus delivering voice/data services within a piconet operating over a limited range or over a WLAN communicating with 3GPP devices by reformatting data into IP format before delivering to the WLAN. The service is short message service (SMS). Upon receipt of an SMS message, relevant routing information is retrieved. A PDGW address for the SMS message is identified and is sent to the PDGW address which identifies the WLAN user equipment (UE) for receiving the SMS and reformats the SMS message into IP format (text or encapsulation) for delivery to the UE. A protocol architecture is provided for SMS delivery over WLANs, in particular, for UMTS/CDMA based SMS over WLAN through two alternative mechanisms, i.e., SMS tunneling and SMS proxy, for protocols for the delivery of SMS across the WLAN. The invention enhances standard 802.11 in the context of UMTS and CDMA 2000; as well as other scenarios.
    Type: Application
    Filed: April 30, 2004
    Publication date: January 6, 2005
    Applicant: InterDigital Technology Corporation
    Inventors: Kamel Shaheen, Prabhakar Chitrapu, Brian Kiernan, Debashish Purkayastha
  • Publication number: 20040248615
    Abstract: A mobile wireless transmit/receive unit (WTRU), components and methods therefor provide continuous communications capability while switching from a wireless connection with a first type of wireless system to a wireless connection with a second type of wireless system. Preferably, the WTRU is configured to switch wireless links from a Universal Mobile Telecommunications System (UMTS) to a wireless local area network (WLAN) or vice versa during a continuous communication session. The invention is preferably implemented by providing an Application Broker for control signaling and a Communications broker for user data flow which may be embodied in an application specific integrated circuit (ASIC).
    Type: Application
    Filed: December 16, 2003
    Publication date: December 9, 2004
    Applicant: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Amarnath Chitti